Darth Rancorus was a Sith Assassin and a former Sith apprentice of Darth Ruyn. His past remains partly unknown except from the part that he was born in the slums of Coruscant. He was one of the participants of the Massacre of Ossus and one of the few to survive. He served as a Hand before Darth Nihl, but was replaced for his failure to capture Miles Croft. He later became a Fist in opposition to Darth Stryfe.